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Calculate the pH and molar concentration of each protonated form for a 0.133 M solution of NaHA.
Aqueous sulfuric acid reacts with solid sodium hydroxide to produce aqueous sodium sulfate and liquid water. If 1.92 g of sodium sulfate is produced from the reaction of 4.9 g of sulfuric acid and 7
In the following reaction: A + 2B --> 3C + D the MM(A) = 75 g/mol, MM (B) = 52 g/mole, MM(C)= 87 g/mol. If 250g of A and 310g of B combined, what is the limiting reagent, and what is the theoreti
At constant temperature and volume, 3.8?10-3 mol of helium is added to a 1.0 L sample of xenon at 0.081 atm and 325 K. What is the total pressure of the gas mixture
The Ka for hypochlorous acid (HClO) is 3.0 x 10?8. What is [OH?] in a 0.145 M solution of sodium hypochlorite (NaClO)
Alpha helices are a type of secondary structure in proteins. What is the length of a 25-kDa single-stranded -helical protein segment. Assume a mean residue mass of 110 Da.
A patient's blood test shows that she has elevated levels of LDL (low density lipoproteins) at 4.12 mmol/L. Convert this concentration to units of molarity (mol/L)
Dimethylamine, (CH3)2NH, is a weak base ( Kb = 5.4 x 10?4). What is the pH of a 0.50 M solution and what is the percent dissociation
A saturated solution of iron(II) hydroxide at 25°C contains 1.0 x 10-5 M Fe2+ ions. Determine the ?G° for the solution at this temperature.
The observed rotation of a solution of 1.3 g of a compound in 10 mL of water is +3.7 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound
In an earlier problem we described the reaction of ammonia with oxygen to form nitrogen monoxide, NO.4NH3 + 5O2 ? 4NO + 6H2O
The specific rotation, [?]D, for sucrose is +67. What is the observed rotation for a solution of 0.20 g of sucrose in 10 mL of water in a sample tube having a pathlength of 10 cm
The pH of a solution of ammonia, NH3, is measured at equilibrium and found to be 11.48. Given that Kb for NH3 is 1.8 X 10?5, what was the initial (before equilibrium) concentration of NH3
A weak acid HX has a dissociation constant (Ka) of 1 x 10?9. Which of the following statements about a 0.1 M solution of HX in water
Within a red blood cell [ATP], [ADP], and [Pi] are maintained under steady state conditions at 1.85 mM, 0.14 mM and 1.0 mM respectively. Calculate the deltaG' of ATP hydrolysis under these condition
Consider the reaction 5Br^- (aq) + BrO3^-(aq)+ 6H^+(aq) ---> 3Br2(aq) + 3H2O(l) The average rate of consumption of Br^- is 1.15×10^?4 M/s over the first two minutes. What is the average rat
Suppose that the molar concentrations for CO and H2 at equilibrium are [CO] = 0.05 and H2= 0.08 . Use the formula CH3OH= Kc[CO][H2]^2 to calculate the concentration of CH3OH.
Consider a reaction A+B=2C having a equilibrium constant Kc=5. If the initial concentrations are [A]=2M [B]=3M and [C]=0M, calculate the equilibrium concentration of [A],[B] and [C]
What dilution would be necessary to get the absorbance of 62.2 down to 3.1
How would I determine the ions and write the correct ionic compound formed by barium and bromine
Calculate the change in molar Gibbs energy of tristearin when a deap-sea creature is brought to the surface ( p=1atm) from a depth of 2km. To calculate the hydrostatic pressure, take the mean densit
The viscosity of the broth is 1.5 cp, the particle density is 15 g/liter and the specific cake resistance (a) is 8.5x1010 cm/g. The diameter of the filter drum is 1.25 m and it length is 1.5 m. Calc